Home / 78,076.04-107,719.68-47,829.80

Finding the Fourth Proportional to 78,076.04, 107,719.68 and 47,829.80

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Solution

The fourth proportional to 78,076.04, 107,719.68 and 47,829.80 is: 65,989.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,076.04 : 107,719.68 = 47,829.80 : x
  2. Step 2: Convert to fraction form
    78,076.04/107,719.68 = 47,829.80/x
  3. Step 3: Cross multiply
    78,076.04x = 107,719.68 × 47,829.80
  4. Step 4: Simplify right side
    78,076.04x = 5,152,210,750.46
  5. Step 5: Solve for x
    x = 5,152,210,750.46/78,076.04
  6. Step 6: Final answer
    x = 65,989.65

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.